As the error was performed by the god Indra, he grants Hanuman a want that his body would be as robust as Indra's Vajra, and that his Vajra may not harm him. As well as Indra other gods have also granted him wishes: the God Agni granted Hanuman a wish https://indiantempleadelaide.tech.blog/2025/01/23/the-importance-of-hindu-temples-in-preserving-faith-and-culture/